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Genealogy

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Versioning is a recommended approach to back up files as protection against hardware failures and user errors. To create versioned backups, you can use established backup programs or an open source tool that originates from the developer world: Git.

Hangover

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The unprecedented hype surrounding OpenStack 10 years ago changed to disillusionment, which has nevertheless had a positive effect: OpenStack is still evolving and is now mainly deployed where it actually makes sense to do so.

Keep It Simple

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Age and Rage are the Go and Rust implementations of a simple, modern, and secure file encryption tool.

Welcome

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Just because it's new, doesn't mean it's better. How I learned to stop worrying and love the old containers.

Guard Duty

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Operators of an OpenStack environment need to know whether the environment is working and quickly pinpoint problems. We look at the basics of OpenStack observability in the Sovereign Cloud Stack.

Silverware

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Declustered RAID decreases resilvering times, restoring a pool to full redundancy in a fraction of the time over the traditional RAIDz. We look at OpenZFS, the first freely distributed open source solution to offer a parity declustered RAID feature.

Curb Complexity

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As the major Linux distributors increasingly lean toward containers, many administrators have come to realize that containers are by no means a panacea for all their problems.

State of the Cluster

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Log analysis can be used to great effect in HPC systems. We present an overview of the current log analysis technologies.

Light into Darkness

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Zeek offers an arsenal of scripts for monitoring popular network protocols and comes with its own policy scripting language for customization.

Stress

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A stress and benchmarking tool for websites controlled from the command line.

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